It means excuse me with a twang to it :] Suminasen, michi ni mayoi mashita.

In what context? What the podcast was about?

Agree with Tiulpan. It sounds like Italian "mi scusi" (that means "excuse me"). I've learned it from "Eurotrip" movie.

Well, you have written it wrong. Haven't you learnt your hiragana yet? zi = ji there is no "s".

It could be a name but the spelling of what it is wrong unless it was mishiki. The pronunciation can make it sound like an s but some times shi can be heard as an s sound.